Conveyer chain



G. R. RODDY CONVEYER CHAIN 2 Sheets-Sheet 1 Filed Jan. 19, 1923 gwuantoz Aug. 12, 1924.

G. R. RODDY CONVEYER CHAIN Filed Jan. 19. 1923 2 Sheets-Sheet 2 61cm nu;

.w M M f Patented Aug. 12, 1924.

UNITED STATES PATENT OFFICE.

GUSTAV It. RODDY, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO CHAIN BELT COMPANY,

OF MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN.

CONVEYER CHAIN.

Application filed January 19, 1923. Serial No. 613,720.

To all whom it may concern.

Be it known that I, GUSTAV R. Room, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and 'State of Wisconsin, have invented certain new and useful Improvements. in Conveyer Chains, of which the following is a specification.

' side'and cross or end bars of the links are rapidly cut out and worn away by the abrasive material conveyed. This destructive action takes place so rapidly that the parts of the cha1n which are in engagement with the bottom of the trough are he uently worn to such extent as to expose t e connecting pintles long before the pintles wear .in their seats to any considerable degree. This is not usual in the ordinary use of conveyor chains, which, under most conditions, show the greatest wear at the joints and parts of articulation, the connecting pintles being the first elements of the links to need replacement.

My invention has for its ob'ect to provide a drag chain with detacha 1e wearing shoes adapted to rest upon the bottom of the trough in which the conveyer moves and to largely take the destructive wear above indicated. The chain is thus relieved and its life materially lengthened, for, if desired, the wearing shoes may be replaced from time to time as the wear away. These wearing shoes are ma e of metal harder than that which enters into the composition of the links of the chain, and this is one of the reasons why such shoes are detachable from the links rather than integral therewith; for in the manufacture of cast conveyer chain links it is common practice to anneal the links after they are cast, and this makes it impracticable to use a very hard iron for the links, such for instance as white iron, the material. of which I prefer to form the shoes.

In the accompanying drawlngs Figure 1 is a an view of a short section of conveyer rag chain to whlch my mvention is applied, one side bar of the full link represented being provided with a wearing shoe, while from the other side bar the shoe has been removed. I

Fig. 2'is a side elevation of a link to which the wearing shoe is applied.

Fi 3 is a longitudinal sectional View on the llne III-III of Fig. 2.

Fi 4 is a,transverse sectional view on the l1ne IVIV of Fig. 2. v

Fig. 5 is an inside view of the wearing shoe.

Fig. 6 is a longitudinal sectional view through a side bar of a chain link to which is applied a wearing shoe of a different con-.

struction than that illustrated in the other views.

Fi 7 is a transverse sectional view on the hue I-VII of Fig. 6.

In the accompanying drawings A desighates the link of a drag chain. It is of well known form, and in practice is made of cast iron and is annealed before being put into use to make it malleable. A series of these links united by pintles B constitute a chain. The pintles pass through the overlapping ends of the side bars 2 and through the hollow transverse connecting bars 3, which unite the side bars at one end of each link. The side bars are represented as being pro- Vided with laterally extending conveying wings 4, preferably of such length that their outer edges extend slightly beyond the parts of the chain at the joints thereof. In use the edges of the side and connecting bars on one face of the chain, rest upon the bottom of a trough in which the chain is adapted to move and into which the material to be conveyed is dumped. The outer edges of the wings are adapted to run close to the side walls of the trough. In the form of chain illustrated the wings 4 are unitedwith the side bars by strengthening webs 5.

D represents a Wearing block which is separable from the chain link and is secured to a side bar thereof, preferably to its outer face. Each side bar of each link is preferably provided with one of the wearing blocks. These are formed of harder metal than that 0% which tle linkfs are1 composed, ordin w ite iron eing oun very suitable fort liis purpose. A single bolt 6 is employed to unite each wearing block to the side bar of a link. The bolt passes throu h an aperture 7 in the side bar, shape to fit the bolt, and prevent the latter straddle 13 to reduce metal and weight.

-Itwill from rotating as the securing nut 8 is screwed tightly. into position to hold the wearing block. An aperture 9 is formed in the wearingblock for the bolt. In order to assist in holding the wearing block in working position on the side bar, one end thereof may be slotted, as at 10, so that it ma the web 5. This prevents the bloc from turning upon the bolt and holds its sides parallel with the edges of the side bar andin working position. v The aperture 9 is surrounded by a boss of metal 11 to give to the bolt 6 a substantial and stron bearing. One end of the block is shaped to bear against the wing 4, while the ot er end may be curved, as at 15, to allow free movement of the end of the side bar of the link pivotally united with the one carrying the lock. The block may be chambered as at 12 and In Figs. 6 and 7 is shown a form of block in which there is a cros end wall 16 at the curved end of the block-which tends to prevent material collecting in the recess 12 surrounding the boss through which passes the securing bolt 6.

The blocks shown in Figs. 1 and 5, inclusive, are not only separab e but are reversible so that when worn on one face they may be removed, turned over, and secured to the opposite side bar of the link.

be seen that I have described several ways by which the wearing block is held in position against the face of the side bar of the link and against the possibility of turning about the single securing bolt; and that one or two, or all of the ways shown, may be used in connection with any single block. One manner of holding the block in place is by causing it to straddle and engage with a web 5 of the chain; another is by causing its end to engage with some ri id part of the chain, such as a wing 4, whic an end of the'block is shaped to fit; while a third way is by providin the block with a flange that engages wit the edge of the side bar. B making the blocks separable as described t ey may be applied to a chain when it is used in conveying materials that will rapidly cut out and wear the chain, and may be removed should the conveyer be used In connection with material of a non-abrasive nature.

What I claim and desire to secure by Letters Patent is 1. The combination with a drag conveyer chain, of a se arable weari block adapt ed to be applied to a link 0 the chain, of harder material than that of which the chain links are formed, and means for detachably securing the block to a link.

2. The. combination witha dragconveyer chain, of a separable wearing block adapted to be applied to the side bar of a link of the chain, a bolt for securing the block to the side bar, and means for holding the block fixed in line with the side bar.

3. The combination with a drag conveyer chain, of a separable wearing block adapted to be applied to the side bar of a link of the chain, a bolt that passes through the side bar and the block for se rably uniting the latter to the former, t e block being shaped to so engage with the link as to be held in line with the side bar when bolted in p ace. 4. The combination with a drag conveyer chain the side bars of the links of which are formed with webs, of wearin blocks shaped to straddle the webs of the links and bolts for fastening the blocks to the side bars of the links.

GUSTAV R. RODDY. 

